The Library of Congress collections include over 110 million items in a variety of formats and languages. The catalog information
for many of these items has appeared in a number of traditional card catalogs located in the Library. Much of the information
in these catalogs is also searchable over the Internet. This page links to the two methods for search the main Library of
Congress Online Catalog and to several specialized catalogs for prints and photographs (PPOC), for sound recordings (SONIC)
and a Z39.50 gateway to the main catalog data.